big bears. big salmon. i came back at superintendent as mount ranier. i had hawaii, guam and the sierras. i was asked to come back and serve as the 18th director. i went through senate confirmation and have been back here since. >> earlier this year, there was three hikers in yosemite that went through a waterfall and presumed to be dead. what the park system doing to keep them safe? guest: the experience was very tragic. i hate to hear about those things. in our job, we are to inform the public to protect themselves from these hazards. it's really not our job to fence off the hazards of the national park. part of that is part of the experience. to see wild america, at least as much that we can create. in the case of the myrtle falls incident, there is a barrier and signs. unfortunately, these individuals crossed those, entered the water, slipped and went over the falls. it's incredibly tragic. we will renew our efforts to warn the public about these thing. yosemite this time of year would have very, very low water flows. because of all the snow, we got